<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			input {
				border: 0;
			}
			.user {
				border: 1px solid pink;
			}
			.nick {
				border-top: 1px solid hotpink;
				border-bottom: 1px solid #CCC;
			}
			.email {
				border-top: 1px solid red;
				border-bottom: 1px solid green;
			}
		</style>
	</head>
	<body>
		用户名：<input type="" class="user" /> <br>
		昵称：<input type="" class="nick" /> <br>
		邮箱：<input type="" class="email" /> <br>
	</body>
</html>
